Electric-lamp socket



Cet. 116, 1928. 'f

, E. E. FALSE ET AL ELECTRI C LAMP SOCKET Filed June 14, 1926 31a/vanto@ ETE @1.55

CFI

Patented Oct. 16, 1928.

UNITED STATES PATENT OFFICE.

ERWIN E. FALBE AND QUAY ROHRER, 0F CORNELL, WISCONSIN.

ELECTRIC-LAMP SGCKET.

i Appncation mea June 14, 1926. serial No 115,922.

Theobject of our invention is to provide a novel electric lamp socket, adapted to take up shocks Aand vibrations without transmitting them to the lamp bulbs and thus overcome or Vneutralize the destructive vibrations onthe tric conductor 3 encirclingtheV block, ground insulation block 5, and screws 7 extending through blocks 2 and 5 and functioning' as an electrical conductor. Ground `block 5 is provided with a spiral Vgroove 6, to carry the spiral spring 9, one end of which is connected with the screw 8, which in turn is attached to inwardly bent portion 4C Yof the corrugated conductor 3. rlhe spring 9 consists of the electrical conductor 10 of metal and the insulation covering 11. VAfter spring 9 is coiled once or twice about member 5, it makes one or two free coils and is then coiled about the spirally grooved portion 13 of the lampreceiving socket 12. The latter element is of insulation material and carries a spirally corrugated metal socket 14 to receive the lamp bulb. This socket has an inwardly bent portion 15, which is engaged by the screw 15, which in turn is in electrical contact with the conductor 10 of spiral spring 9. Vile provide a flexible insulated conductor 17, electrically connecting screw 7 in member 1 with the screw 1811i member 12. Screw 18 is attached to the spring contact member 19, which conducts the electric current to vthey lamp bulb.

It will be observed that the spring 9 functions both as a vibration absorbing element and as an electrical conductor.

It gives the necessary resilience to the lamp socket to overcome the strain of external vibrations, such as may occur in factory buildings, on bridges, moving objects, in dancing halls and elsewhere where vibrations exert their destruc tive influence on the life of electric light bulbs. The flexible insulated conductor is in the form of a slack wire and permits of relative move'- ment of members 1 and 12.

- What we claim is:

` 1. A shock absorbing electric lamp socket, comprising a plug, a lamp receiving socket separate from the plug, a coiled spring connecting the plug to the lamp socket and also functioning as an electrical conductor, the plug and the lamp socketeach having external spirally grooved portions in which one or two turns ofthe coiled spring are seated, and a relatively short. insulated slack wire eXtending between electrical conductors in the central portion of the plug and the central portion of the lamp socket to function as the other conductor;

2. In a shock absorbing electric lamp bulb socket, the combination of a plug, an electric lamp socket detachable from the plug, a coiled spring eXtendinOr between the plug and the lamp socketand functioning as anv electrical conductor to resiliently hold said elements in spaced relation, a flexible conductor also extending between said elementsV and disposed in contact with the conducting screws of said members, spirally corrugated metal cylinder members mounted on the plug and in the lamp socket respectively to func tion as attaching members, each of said mem'- bers having inwardly turned portions, screws connecting said inwardly turned portions with one end of the coiled spring in the respective members, screwsmounted in the central portions of each of said members to which the fiexible electrical conductor is attached, and a springcontact element carried bythe screw in the lamp socket section, substantially as shown and described.

ERVIN E. FALBE. QUAY ROHRER. 

